Milling tool



Nov. 30, 1948. H. M. BRAUCHER MILLING TOOL Filed Sept. 11, 1946 N mm Q Q k\ Sm, Q m m Q m W m% kw MN M m m hvw 3mm HARvEY lVLEl RALIEHER,

J%1M //M,MM

Nam-30, 1948. H. M. BRAUCHER 2,

MILLING TOOL Filed Sept. 11, {L946 2 Sheets-Sheet 2 as 88 34 /6 7 6a 23 59 6a 26 i i 6 86 I l -39 26 67 as 66 22 7 I \55; l- 7 6.5 A5 2/ A5 /4 I I a I I /0 I I 6"L gvwcmto i HARVEY IVLB HAL! CHER,

Patented Nov. 30, 1948 UNITED, STATES PATENT OFFICE .MILLING 'rooL A Harvey M Braucher, Baltimore, Md.- Application-September 1 1, 194 Serial No. 696,327 v 3Claims (or 90-14) 1f} (Granted indefinite of; March 3, 1883, as

amendedApril 30, 19284-370 757) The invention described herein may be manufactured and used by or for the Government-for governmental purposes, withoutthe payment to me of any royalty thereon.

This invention relates to improvements in milling tools, particularly tools for processing the ends of cartridge cups. 4

An object of the present invention is to-provide a milling toolfonoperation as pjartof a semi-automatic machine which-feeds cartridge cups to the tool and rigidly clampsthem in position while the open end of each 'cupis milled by the tool to reduce the cup to a definite length.

The present invention is intended foruse in, but not necessarily limited'to, the device shown in application Serial No. 549,243; filed August 12,

1944, for Milling machine'go'f which' the present A base-l carries a gearca'sing 2 housing; re-

duction gearing driven by a primer mover; not shown, through a belt 3. Standards 4, carried by the base I, support a stationary housing 5 which surrounds a work table 6 slidable over an annular ring support 1 secured to the housing 5. The work table 6 is rotatably mounted upon a pedestal 8 and intermittently driven by a ratchet 9, keyed to the work table 6, and a pawl l0 rotatable about the pedestal 8 and actuated by a connecting rod ll pivoted upon a wrist pin I2 carried by a crank disk l3 driven by the reduction gearing housed within the casing 2.

The work table 6 is provided with slots in which are slidable clamp members H for gripping a cartridge cup to rotate the same over the annular ring support I to position the cartridge cup under a milling tool, indicated generally by the reference numeral I6.

To bring each cartridge cup to a stop directly under the milling tool, studs ll, equally spaced about the ratchet 9 and corresponding to the pockets in the work table 6, are engaged by an indexing arm l8 pivoted on the depending bracket l9 (Fig. 1, bolted to the underside of the housing 5 and urged into engagement with the studs I! by a tension spring 20. V

A table 2| is mounted on the pedestal 8 for a n 2 receiving a supply of cartridge cups from which they are placed in the slots of the work table 6 ;to beheld therein by the clamp member l4.

Further details of the machine are given in the application Serial No. 549,243, of which this application is a continuation-in-part.

The milling tool I6 is slidably and rotatably supported in aligned bearings .22 and 23 secured to an upstanding support 24 attached to the machine base I.

Rotatably mounted between the bearings 22 and ,23, is a sleeve 25 to which is secured a sprocket 26 meshing with a chain 21 which in turn engages a sprocket 28 driven by the reduction gearing within the housing 2 through a horizontal shaft 29, bevel gears 30 and a vertical shaft 3| journaled in a bearing 32.

A plate 33 is interposed between the bottom of sleeve 25 and the bearing 22 to provide a thrust bearing for the sleeve 25.

A reciprocating spindle 34 has attached thereto a key 35 slidable within a keyway 36 extending the length of the sleeve 25 whereby the same will rotate the spindle 34 while being free to be reciprocated by a cam mechanism to be described. Bushings 31 mounted Within the bearings-22 and 23 provide bearing surfaces for the spindle 34.

. The spindle 34 is provided near the top thereof with anannular groove 38 rotatably receiving a flange 39 integral with a ring 40 bolted to a collar 4| having an aperture 42 in which is secured a pin 43 by a set screw 44. Thus the ring 40, will transmit a push-and-pull motion to the i spindle 34 to reciprocate the same and allow the same to be rotated by the sprocketed sleeve 25.

The pin 43 is part of a cam yoke 45 guided by a guide rod 46 slidable in a bearing block 41 bolted to the support 24.

The cam yoke 45, and thereby the spindle 34 is reciprocated by a cam 48 rotatably mounted in a bearing 49 bolted to the support 24. The cam 48 is attached to a horizontal drive shaft 50 driven through bevel gears 5| by a vertical shaft 52 deriving its power from the reduction gearing within-the housing 2. A bracket 53, which may be mounted in any convenient manner, additionally supports the shafts 50 and 52.

Thus, through the combined action of the cam 48 and the sprocket gearing; the spindle 34 is simultaneously rotated and reciprocated for a purpose to be described.

A cutting tool 54 is bolted to a plate 55 having a threaded stem 55 received within an adjusting nut 5'! which in turn is threaded upon 3 threaded part 56 of a plunger 58 slidable within the spindle 34, the travel of said plunger 58 being limited by a pin 59 fastened to the plunger 58 and extending through a slotted opening 60 in the spindle 34.

A compression spring BI is mounted within the spindle 3,4 and has one end against an internal shoulder 62 in the spindle 34 and the other end against the adjusting nut 51. The spring 6| hold the milling tool 54 against the cartridge cup l5 with the proper pressure to obtain the desired cut. The adjusting nut 51 adjusts the effective combined length of the plunger 58 and. tool 5 3 to control the amount of out to be re, moved from various sized cups, set screws 51" locking the sleeve 5'! to the threaded parts 55 and 56,

In operation of the machine, cartridge. cups are placed upright in the work table slots by hand. The work table 6 is turned intermittently carrying the cups successively under the continuously rotating milling cutter 54. After, a cup has been positioned under the cutter 5|, the work table 6 is held while the cutter 54 is moved downwardly by the cam 48 to trim the cup end.

When the milling operation is completed, the cutter 54 is raised by the cam-48 and the work table 6 is stepped around to advance another cup under the cutter 54 for trimming and to remove the milled cup for discharge by gravity through an opening, not shown.

It is to be understood that while a preferred embodiment is shown and described, various changes in the shape, size, arrangement. of parts may be resorted to without departing from the spirit of the invention and scope of the following claims.

I claim:

1. A tool mounting for use with a work processing machine comprising a yoke, a cam in said i for rotating the sleeve and consequently the spin- 50 die, a plunger slidable in the lower end of the spindle for attachment of a work engaging tool, a spring backing said plunger, a stem extending into said spindle threadedly connected with the plunger whereby said plunger may be adjusted relative to work pieces; and means for limiting the movement of the plunger in the spindle.

2. In a milling device, the combination of a plunger, a cutter tool secured thereto, a spindle slidably receiving said plunger, spring means coiled about said plunger and bearing against said spindle and said plunger for urging the latter axially of the former, means between said spindle and plunger for limiting relative axial movement between the same, a stationary bearing means, a sleeve having an axial keyway and rotatable upon said bearing means, key means slidable in said keyway and secured to said spindle whereby the same will rotate with, and move axially relative to said sleeve, means for rotatme said sleeve and means, including a cam and a. follower rotatable on. but. axially fixed with said spindle, to reciprocate said spindle simultaneously during rotation thereoI.

3- In a milli device, the. co i tion of a plunger, a, nutter tool secured thereto, a spindle slidably receiving said plunger, spring means o led about. said p ung r nd earin a ai st said spindle andv said plunger for urging the latter axially of the former, means between said spindle and plunger for limiting relative axial movement between th same, a stationary bearing means, a sleeve rotatable upon said bearing means, means securing said. spindle for rotary movement with and axial movement relative to said sleeve, means, Ior rotating said sleeve, and means, includingv a cam and a follower rotatable on but axially fixed with said spindle, to reciprocate said spindle simultaneously during rotation thereof.

HARVEY M. BRAUCHER.

REFERENCES CITED The. following references are of record in the file of this patent:

UNILTED s'rA'rEs PATENTS umber Nam Date 281,138 Richa d t-4 Ju y 3 1,889,653 

